Really depends on your budget. The most effective way in the shortest possible time would be with AdWords. You can outbid buffer/others in your industry and your website will show up ahead of them. Keep in mind that you will need to bid more and will need a decent budget.
Organic marketing will take time. Take a look at companies like Intercom, they dont market their product but create great content around the target market. Intercom has actually published a great e-book on this. The other option is to build interactive pieces like calculators. This should be focused on what happens if the customer does not leverage your product and potential revenue/other metrics they could be missing out on.